Elevator control



June 26, 1923.

1,460,091 Y E. G. BAHL `ELEVATOR CONTROL Filed Jul'y 15, 1922 2 Sheets-Sheet l 4 `)une 26, 1923.

1,460,091, E. G. BAHL ELEVATOR CONTROL Filed July 15. 1922 2 sheets-Sheet' 2 Patented June 26, 1.923.y

UNITEDy STATES nanou) G. BAHL, or LincoLN, NEBRASKA.

nLnvA'ron CONTR-0L.

'Application Ied .Tuly 15, 1922. Serial No. `575,157. y

To allwhomz'tmay concern.' y

Be it known thatI, ERRoLD G. BAEL,- a citizen of the United States, residing at Irincoln, in the county of Lancaster and `State of Nebraska, have invented new and useful Improvements in Elevator Controls, of which the following is a Specification.

This invention relates to aeroplane controls, particularly to the elevator, and has for its object the provision of an elevator and control mechanism in which a `one piece elevator isemployed mounted within a cut away portion at the rear end of the fuselage, the control wires for the' elevator being enclosed entirely within the fuselage whereby to lessen wind resistance and to decrease liability of injury to the control.

An important and more specic object is the provision of an elevator which is pro-y vided with a single pair of operating horns extending from the upper and lower `surfaces thereof, the horns being` laterally offset in opposite directions so that the control wires connected therewith will ci'lear the standard of the rudder which is journaled through the fuselage. y

An additional object is the provision of an elevator and controltherefor, which will be simple and inexpensive in manufacture and installation, highly efficient in use, durable in service, and a general improvement in the art.

With the above and other objects and advantages in view, the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which- Figure 1 is a side elevation of the rear end of the aeroplane showing my device in position, a part of the fuselage being broken away and in section.

Figure 2 is a horizontal sectional view through the fuselage taken immediately above the elevator structure, and

Figure 3 is a fragmentary front elevation of the elevator.

Referring more particularly to the drawings, the letter A designates a portion of the fuselage of an aeroplane, B designates the bearing shoe below the rear end thereof, C designates the vertically disposed rudder post which carries the rudder D and in advance of which is mounted the usual lin E. The details of the rudder structure and means for operating the same are not shown as forming notpart of the present invention.

In carrying out my invention I form the rear end of the fuselage A. with a V-shaped cutlout portion 10` and within this .cut-out portion is secured a transverse rod or shaft 11 upon which is hinged, `as shown at 12,

the elevator 13 which is formed in one piece` `and which is freely movable within the limits defined bythe edgesof the cutout portion 10. Extending from Athe sides ofthe fuselage are the horizontal fins 14 which are located in advance ofthe elevator. j Y

Suitably secured to and extending above the upper surface of the elevator is a horn `15 which has its end portion apertured, as

shown at 16, for connection with al control wire `17 or the like, and' secured to and extending from the lower sideI of the. elevator is a similar horn 18, apertured, as shown at 19, for connection with acontrol wire"20 or the like.` The means `for applying a pull to eitherr wire17 or 20` for lthe purpose of moving the elevator is not shown, as such forms no part of the present invention, it being moreover ccnventionalgtoprovide any suitable lever mechanism for moving these control wires. `Qwingkto the fact` that the horns 15 and k18` are located kin alignment with and to the rear of the rudder post C, I o-set the extremities of the horns in opposite directions, as shown at 21 and 22, respectively, whereby the operating wires will clear the rudder post, one extending along one side thereof, and the other extending along the other side.

In the operation it will be seen that when the wire 17 or 2O is pulled by any suitable means, not shown, theV elevator will be moved from the horizontal position to an upwardly or downwardly inclined position as the case may be, depending upon whether it is desired to ascend or descend. Owing to the offsetting of the horns it will be apparent that' the control wires will never interfere with the rudder and that there will consequently be no binding whatever between any of the parts during movement thereof. It is also to be noted that the control wires are located entirely within the confines of the fuselage and that'air resistance will consequently be diminished and that danger of injury to the control wires will be reduced to the minimum. Owing to the cutting away 'of the rear end of the fuselage and the specific arrangement of the parts, it will be apparentthat the elevator may conveniently bel foimed in o-nefpiece` instead` of in two, asis the usual practice.

lVhile I have shown and described the" preferred embodiment of my invention, it is of course to be understood that I reserve the right tomake such changes in `the form construction andv arrangement of parts as will not depart from the spirit yof the invention or the scope of the subjoined claims. Having thus'described my invention, I

l claim 1- 1. In anaeroplaneincluding a, fuselage, a

vertically disposed rudder post'journaled Y through the rear end of the `fuselage and carrying a rudder, an elevator, the rear end of the fuselage being vcut away for the re`A ception of the forward edge of the elevator,

i a transverse rod Vsecured within the innermost portion of the cutout portion, the forward edge of the elevator being hingedly connected with said rod, horns extending upwardly and downwardly from the upper and lower surfaceslof" the elevator, respectively, andi con-trol members secured to the extremities of said. horns.

'2. In an aeroplane including ay fuselage, a vertically disposed rudder post iournaledA through the'rear end ofthe fuselage and carrying` a rudder, an` elevator, the rear end of the fuselage'being cut-awayv for the reception of the forward edge of the elevator,

` and lower `surfaces of the elevator, respectively, and control members secured to the extremities `of said horns, said horns being most portion of the cutout portion, the for! ward edge of the elevator being hingedly connected with said rod, horns extending upwardly and downwardly from they upper and lower surfaces of the elevator, respectively, rand control members secured to the extremities of `saidhorns, said'horns being in alignment with and tothe rear of the rudder post andlhaving'their extremities offset whereby the control means will be disposed out of contact with the rudder post, one horn being offset in one direction and the other in the opposite direction.

4L. In anaeroplane including afuselage', and arudder post journaled through the rear end thereof and; carrying a rudder, a transverse shaft secured at the' rear Aend of t-lie fuselageto therearv of the rudder post, an

elevator formed in'one piece Apivote'd upon said shaft, horns extending from Ythe upper and lower surfaces of the elevator out of alignment with the rudder post, and control wires connected with the extremitiesof said horns and contained entirely within the fuselage. f l

In testimony whereof I hereto affix my signature. l

` ERROLD BA1-IL. 

